What is Electrostatic force: Definition and 184 Discussions

Coulomb's law, or Coulomb's inverse-square law, is an experimental law of physics that quantifies the amount of force between two stationary, electrically charged particles. The electric force between charged bodies at rest is conventionally called electrostatic force or Coulomb force. The law was first discovered in 1785 by French physicist Charles-Augustin de Coulomb, hence the name. Coulomb's law was essential to the development of the theory of electromagnetism, maybe even its starting point, as it made it possible to discuss the quantity of electric charge in a meaningful way.The law states that the magnitude of the electrostatic force of attraction or repulsion between two point charges is directly proportional to the product of the magnitudes of charges and inversely proportional to the square of the distance between them,

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q

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{\displaystyle |F|=k_{\text{e}}{\frac {|q_{1}q_{2}|}{r^{2}}}}
Here, ke is Coulomb's constant (ke ≈ 8.988×109 N⋅m2⋅C−2), q1 and q2 are the signed magnitudes of the charges, and the scalar r is the distance between the charges.
The force is along the straight line joining the two charges. If the charges have the same sign, the electrostatic force between them is repulsive; if they have different signs, the force between them is attractive.
Being an inverse-square law, the law is analogous to Isaac Newton's inverse-square law of universal gravitation, but gravitational forces are always attractive, while electrostatic forces can be attractive or repulsive. Coulomb's law can be used to derive Gauss's law, and vice versa. In the case of a single stationary point charge, the two laws are equivalent, expressing the same physical law in different ways. The law has been tested extensively, and observations have upheld the law on the scale from 10−16 m to 108 m.

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1. I Electrostatic force exerted on an electron inside a nucleus

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2. A Is Gravity Just the Electrostatic Force?

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3. Help with Coulomb's law: Net electrostatic force

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4. I How to ensure an equation is dimensionless when it includes "Debye"

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5. Does the electrostatic force create current in the circuit?

As I understand potential difference is the reason of current. Does it mean that the electrostatic force creates current?
6. Electrostatic force equilibrium

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7. Electrons cannot sense electrostatic force?

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8. How do the charges in 3 cancel each other out in net electrostatic force?

Here is the question no1 in image. A charge is in between . We will let it possitive or negative. The answer is 3,1,2 4...But how? Won't the charges in 3 cancel each other out because they are possitive at right and negative at left. One is attracting so the other is repelling.
9. Electrostatic force with and without a conductor in between

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10. How many electrons were transferred to create an attractive force of 1 N?

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11. Confusion about the Lorentz force

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12. Electrostatic Force and Field between two charges

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13. Electrostatic force between a Half Cylinder and a Plate

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14. What is the electrostatic force field?

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15. S

Electrostatic Force - Locations of a second charge

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16. What is the net electrostatic force of the sphere at the origin?

Homework Statement Three charged metal spheres are arrayed in the xy plane so that they form an eqilateral triangle. What is the net electrostatic force on the sphere at the origin? http://imgur.com/a/4XnoO (sorry I forgot to put this but the angles are 90 for each vertex, which should be...
17. Potential Difference & Force on Electrostatic Sphere

Homework Statement A uniformly charged, solid, non-conducting sphere of radius ##a## and charge density ##\rho## has its center located a distance ##d## from a uniformly charged, non-conducting, infinite sheet (charge density ##\sigma##). Determine the potential difference between the center of...
18. Maximizing Electrostatic Force between Two Point Charges

Homework Statement Two point charges q and λq located at the points, x=a & x=μa respectively. If the sum of the two charges is constant,what is the value of λ for which the magnitude of the electrostatic force is maximum?Homework Equations The Attempt at a Solution For force to be maximum dF/dq...
19. Electrostatic Force: +3.2 C & -1.6 C Magnitude of Force

Homework Statement I have a question that I think I know, but it is kind of confusing me a little bit. The problem is as following: Consider a charge of +3.2 C and a charge of -1.6 C separated by a distance of radius r. Which of the following statements correctly describes the magnitude of...
20. Calculating electrostatic force on particles

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21. Electrostatic force on polymer particle in an electric field

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22. What is the *truth* of the electrostatic force

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23. The force between charged and neutral object

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24. Missmatch in electrostatic force calc. by different methods

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25. Force on a charge due to charged sheet

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26. What is the explanation for the electrostatic force between two charged bodies?

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27. What is the unknown charge if the net electrostatic force on particle 1 is zero?

1. The problem statement: In the figure four particles form a square with edge length a = 2.44 × 10-2 m. The charges are q1 = q4 = 1.06 × 10-15 C and q2 = q3 = q. What is q if the net electrostatic force on particle 1 is zero? All variables and given/known data: The given variable are in the...
28. Electrostatic force between two halves of sphere

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29. How to get maximum electrostatic force?

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30. Finding magnitude of electrostatic force

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31. I'm making an Arithmetic Error, Electrostatic force diagrams

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32. Finding magnitude of electrostatic force

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33. Electrostatic and gravitational force

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34. When current flows through 2 parallel wires (same amount of current)

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35. Electrostatic Force Between Proton and Neutron?

After calculating the force upon an electron and a force upon a proton in the atom of hydrogen, my result was a force of ≈8.2x10-8 Newtons acting upon the electron and proton each. If found this by using the formula Fe = (ke q1q2)/r2 Taking this number, I then applied it in the formula F = ma...
36. Electrostatic Force Concept Question

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37. Calculating Electrostatic Force Between Pennies with Slight Charge Differences

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38. Why does electrostatic force move water but not magnetism?

So I was surprised to notice that my plastic shopping bag was able to actually push and pull tap water significantly far with its electrostatic force. But when I put a magnet near the water nothing happened. What makes the electrostatic force so different from magnetic force; isn't it just two...
39. What is the electrostatic force on the Y charge?

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40. Problem on electrostatic force

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41. Hai Calculating Net Electrostatic Force Need help :(

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42. Electrostatic force in a medium of non uniform permittivity

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43. What factors could alter electrostatic force?

While investigating Coulomb's Law, I created a graph of F-1/2 vs. r to display results. The gradient of this graph is much steeper than it should be. What factors could affect the electrostatic force to make this happen? Any suggestions would be greatly appreciated! (The experiment...
44. MHB Electrostatic Force: Effects of Distance

How does electrostatic force vary between two objects if the distance is doubled? I know with gravitational force as the distance doubles the force decreases by $$\frac{1}{4}$$.
45. Electrostatic force, voltage, electrostatic potential

Hello everyone I am stuck with a problem about voltages (electrostatic potential) and forces. According to capacitor equations the energy stored in the capacitor is: U=1/2*C*V^2 And force is: F = - dU/dx Since U is dependent on V^2, our force can’t be positive (repelling...
46. Electrostatic force between 2 hemispheres

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47. Finding the magnitude of the electrostatic force from a thin rod

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48. Work done by electrostatic force. Positive or negative?

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49. Does the Electrostatic Force Originate from Curvature? An Explanation

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50. Work done by electrostatic force

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